Police in the northern province of Hai Duong have confiscated more than a ton of pork and pork fat of unknown origins, which was set to be transported to Hai Phong City.

Hai Duong authorities are tightening controls over the slaughter and transport of pigs as the blue-ear disease has recurred in the province after a gap of nine months, with nearly 40 pigs so far killed this month.

The pig meat and fat, which were found at Vu Thi Tien's house on Le Chan Street in Hai Duong Town, were untested and their origins unknown, the police said.

Around 55 kilograms had become rotten, they added.

Tien told the police that she bought pork from Hai Duong Town and Gia Loc, Tu Ky, and Ninh Giang districts in the province every day and sold them in the neighboring Hai Phong City.